private bool RefillFromReadOnlySequence(ref ReadOnlySpan <byte> buffer, ref ParserInternalState state, bool mustSucceed)
{
CheckCurrentBufferIsEmpty(ref state);
if (state.totalBytesRetired + state.bufferSize == state.currentLimit)
{
// Oops, we hit a limit.
if (mustSucceed)
{
throw InvalidProtocolBufferException.TruncatedMessage();
}
else
{
return(false);
}
}
state.totalBytesRetired += state.bufferSize;
state.bufferPos = 0;
state.bufferSize = 0;
while (readOnlySequenceEnumerator.MoveNext())
{
buffer = readOnlySequenceEnumerator.Current.Span;
state.bufferSize = buffer.Length;
if (buffer.Length != 0)
{
break;
}
}
if (state.bufferSize == 0)
{
if (mustSucceed)
{
throw InvalidProtocolBufferException.TruncatedMessage();
}
else
{
return(false);
}
}
else
{
RecomputeBufferSizeAfterLimit(ref state);
int totalBytesRead =
state.totalBytesRetired + state.bufferSize + state.bufferSizeAfterLimit;
if (totalBytesRead < 0 || totalBytesRead > state.sizeLimit)
{
throw InvalidProtocolBufferException.SizeLimitExceeded();
}
return(true);
}
}
private bool RefillFromCodedInputStream(ref ReadOnlySpan <byte> buffer, ref ParserInternalState state, bool mustSucceed)
{
CheckCurrentBufferIsEmpty(ref state);
if (state.totalBytesRetired + state.bufferSize == state.currentLimit)
{
// Oops, we hit a limit.
if (mustSucceed)
{
throw InvalidProtocolBufferException.TruncatedMessage();
}
else
{
return(false);
}
}
Stream input = codedInputStream.InternalInputStream;
state.totalBytesRetired += state.bufferSize;
state.bufferPos = 0;
state.bufferSize = (input == null) ? 0 : input.Read(codedInputStream.InternalBuffer, 0, buffer.Length);
if (state.bufferSize < 0)
{
throw new InvalidOperationException("Stream.Read returned a negative count");
}
if (state.bufferSize == 0)
{
if (mustSucceed)
{
throw InvalidProtocolBufferException.TruncatedMessage();
}
else
{
return(false);
}
}
else
{
RecomputeBufferSizeAfterLimit(ref state);
int totalBytesRead =
state.totalBytesRetired + state.bufferSize + state.bufferSizeAfterLimit;
if (totalBytesRead < 0 || totalBytesRead > state.sizeLimit)
{
throw InvalidProtocolBufferException.SizeLimitExceeded();
}
return(true);
}
}